CVE-2020-24686 | BDVDB-2026-149709 Detail

ABBAC500 V2 products with onboard Ethernet

Description#

The vulnerabilities can be exploited to cause the web visualization component of the PLC to stop and not respond, leading to genuine users losing remote visibility of the PLC state. If a user attempts to login to the PLC while this vulnerability is exploited, the PLC will show an error state and refuse connections to Automation Builder. The execution of the PLC application is not affected by this vulnerability. This issue affects ABB AC500 V2 products with onboard Ethernet.

Impact#

Per CVSS v3.1: confidentiality impact none, integrity impact none, availability impact high. Attack vector: network.

Weaknesses#

CWE-400 Uncontrolled Resource Consumption

References#

https://search.abb.com/library/Download.aspx?DocumentID=3ADR010645&LanguageCode=en&DocumentPartId=&Action=Launch

Exploit#

No public exploit known

History#

Version 12021-02-26Record published in the CVE List.
Version 22024-08-04Most recent update recorded in the CVE List.

Published

Published: 2021-02-26
Last modified: 2024-08-04

Vendor information

Vendor: ABB
Product: AC500 V2 products with onboard Ethernet

All ABB vulnerabilities

Score

7.5 High

EPSS

2.4%, Low

Estimated chance of exploitation in the next 30 days. EPSS percentile: 84.8.

KEV

Not listed in the CISA Known Exploited Vulnerabilities catalog.

Impact

Denial of Service

Action

No specific action is recorded in the source data. Check the references for vendor guidance.

Affected Systems

Vulnerable
All
Fixed
Not stated

Scoring System

CVSS v4.0

Not available

CVSS v3.1

7.5 High

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

Metric breakdown
Attack Vector	Network
Attack Complexity	Low
Privileges Required	None
User Interaction	None
Scope	Unchanged
Confidentiality	None
Integrity	None
Availability	High

CVSS v3.0

Not available

CVSS v2

Not available

Source: CVE List v5 (record); CISA KEV (kev, action); FIRST EPSS (epss).